Leveling tool for condensate pump of nuclear power station and using method

Abstract

The invention belongs to the technical field of nuclear power station rotating equipment overhauling, and discloses a nuclear power station condensate pump leveling tool and a using method thereof.The tool comprises a connecting flange, an electric adjusting device, a lead screw, a hanging ring, a fixing shaft, a rolling shaft and a support, the support is arranged above the connecting flange, and the lead screw penetrates through the fixing shaft and is connected with the electric adjusting device; and the hanging ring, the fixed shaft and the rolling shaft are arranged between the two iron plates above the bracket. The tool is simple in structure and convenient to use, leveling can be remotely operated by a single person, the personal injury risk is reduced, the industrial safety risk of field operation is reduced to the minimum, the occupied time of a conventional island main traveling crane is shortened, the number of workers is reduced, and then the whole overhaul period is optimized.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of nuclear power plant rotating equipment maintenance, and particularly relates to a leveling tool for a condensate pump of a nuclear power plant and a use method. BACKGROUND

[0002] During the overhaul of the 5 and 6 units, the condensate pump needs to be hoisted out as a whole to the maintenance workshop for overall disassembly and overhaul. The height of the pump body to be hoisted out is 11.5 m. After hoisting out, the pump body needs to be turned over as a whole. After the equipment is overhauled, the whole pump needs to be turned over again by using a tool until it is hoisted horizontally.

[0003] Due to the fact that the outlet flange of the condensate pump is offset to one side, the whole pump body is greatly inclined after being hoisted vertically. The pre-work needs to use another crane to pull the whole pump straight by using a hoist belt. During this working process, the condensate pump is always in a hoisting state, and personnel beside the hoist belt exist the risk of personal injury. Since this operation cannot be completed at one time, it needs to be completed by cooperating with the crane for multiple times. This work needs to occupy the main crane of the conventional island for a long time, which affects the overhaul operation of the steam turbine and further affects the overhaul period of the whole overhaul. SUMMARY

[0004] The purpose of the present application is to provide a leveling tool for a condensate pump of a nuclear power plant and a use method. The tool has a simple structure, is convenient to use, can optimize the hoisting point to a whole, can remotely control the leveling of the pump body, saves manpower, and saves the use time of the main crane of the conventional island.

[0005] In order to achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0006] In a first aspect, the present application provides a leveling tool for a condensate pump of a nuclear power plant, comprising a connecting flange, an electric adjusting device, a lead screw, a lifting ring, a fixed shaft, a rolling shaft and a bracket. The bracket is arranged above the connecting flange. The lead screw is arranged through the inside of the fixed shaft and is connected with the electric adjusting device. The lifting ring, the fixed shaft and the rolling shaft are arranged between the two iron plates above the bracket.

[0007] In some embodiments, the connecting flange and the bracket are connected by welding.

[0008] In some embodiments, the lead screw passes through the inside of the fixed shaft and is connected by threads.

[0009] In some embodiments, the rolling shaft is slidingly arranged on the bracket track.

[0010] In some embodiments, the electric adjusting device has a servo motor connected by electricity, a battery, a control circuit and a reduction gear, the battery powers the servo motor, the servo motor is connected to the reduction gear, and the reduction gear is in driving connection with the lead screw.

[0011] In some embodiments, a level sensor is installed in the electric adjusting device, and a signal is transmitted to the control circuit when reaching a level position.

[0012] In some embodiments, a signal receiver is arranged in the control circuit, and the signal receiver receives the signal.

[0013] In some embodiments, the level sensor is arranged above the battery.

[0014] In some embodiments, the servo motor is arranged below the battery.

[0015] In the second aspect, the application provides a use method of a leveling tool for a condensate pump of a nuclear power plant, comprising:

[0016] Step 1: the connecting flange is flange-connected with the condensate pump;

[0017] Step 2: a crane is connected with the lifting ring, and the condensate pump is lifted to a certain height;

[0018] Step 3: the levelness of the condensate pump at this time is judged through the information returned by the level sensor, and adjustment is performed through remote control.

[0019] Step 4: the lead screw cooperates with the fixed shaft, and the rolling shaft moves with the main support.

[0020] Step 5: the level sensor feeds back a signal that the pump body has been adjusted.

[0021] Compared with the prior art, the leveling tool for a condensate pump of a nuclear power plant and the use method provided by the application have the following beneficial effects:

[0022] The tool provided by the application can be directly installed at the top end of the equipment, optimizes the overall lifting mode of the condensate pump from the original four lifting points to single-point lifting, is equipped with remote operation remote control, and can directly remotely operate the equipment leveling. The industrial safety risk of field operation is reduced to the minimum, the occupation time of the main traveling car of the conventional island is reduced, the number of workers is reduced, and the entire maintenance period is optimized.

[0023] The application can simply and reliably level the condensate pump, can remotely use the remote control to work, reduces the industrial safety risk, and has important significance for the safety of the equipment and the state of the unit.

[0024] The tool provided by the application has simple structure, is convenient to use, can be operated remotely by one person to reduce the risk of personal injury, can be operated by one person to improve work efficiency, reduces the number of workers and working time, saves the overhaul period, uses the gear conversion ratio to save labor and reduce the number of operators. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the application, the following will briefly introduce the drawings needed to be used in the technical description.

[0026] Figure 1 a use state diagram of the leveling tool for the condensate pump of the nuclear power plant provided by the application;

[0027] Figure 2 a partial structure schematic diagram of the leveling tool for the condensate pump of the nuclear power plant provided by the application;

[0028] Figure 3 a flowchart of the use method of the leveling tool for the condensate pump of the nuclear power plant provided by the application.

[0029] EXPLANATION OF REFERENCE NUMERALS:

[0030] 1, connecting flange; 2, electric adjusting device; 3, screw rod; 4, lifting ring; 5, fixed shaft; 6, rolling shaft; 7, support; 8, servo motor; 9, battery; 10, level sensor; 11, control circuit; 12, reduction gear. DETAILED DESCRIPTION

[0031] The following will be further described in detail through specific embodiments.

[0032] As shown in Figure 1 and Figure 2 , the leveling tool for the condensate pump of the nuclear power plant provided by the application includes a connecting flange 1, an electric adjusting device 2, a screw rod 3, a lifting ring 4, a fixed shaft 5, a rolling shaft 6 and a support 7. The electric adjusting device 2 includes a servo motor 8, a battery 9, a level sensor 10, a control circuit 11 and a reduction gear 12. The tool allows the operator to fine-tune the levelness of the pump body through remote control after the pump body is lifted off the ground, thereby avoiding the low efficiency and safety risks caused by repeated lifting and lowering of the crane for manual adjustment.

[0033] The connecting flange 1 is a large integral half-flange, which can be directly installed on the condensate pump body. The upper part of the connecting flange 1 is connected to the support 7 (the lifting ring fixing support), which moves left and right with the rotation of the screw rod 3. The fixed shaft 5 also moves left and right, thereby controlling the overall left and right movement of the lifting ring 4, forming the eccentricity of the lifting point and achieving the leveling result.

[0034] Preferably, the connecting flange 1 and the support 7 are connected in an integral welding manner.

[0035] Electric adjusting device 2 is arranged on one side of the top of connecting flange 1, which is internally provided with control circuit 11 and reduction gear 12, and the left and right movements of lifting ring 4 can be controlled through remote control.

[0036] Electric adjusting device 2 is further arranged with electrically connected servo motor 8 and battery 9, battery 9 supplies power for servo motor 8, servo motor 8 is connected with reduction gear 12, and reduction gear 12 is in transmission connection with lead screw 3.

[0037] Servo motor 8 is arranged below battery 9, and horizontal sensor 10 is arranged above battery 9.

[0038] Horizontal sensor 10 is fixed in electric adjusting device 2, and can transmit a signal to a signal receiver in control circuit 11 after reaching a horizontal position.

[0039] Preferably, control circuit 11 has a signal receiver inside, which can receive external signals.

[0040] Preferably, battery 9 is installed in combination with reduction gear 12.

[0041] Lead screw 3 passes through fixed shaft 5 inside, and the two are in threaded connection, lifting ring 4 is directly fixed in the middle of the iron plate, and rolling shaft 6 slides on the support rail. Through the rotation of lead screw 3, fixed shaft 5 moves left and right, thereby driving rolling shaft 6 and lifting ring 4 to move left and right together. The support rail is arranged on support 7 and is directly welded on support 7 as a whole structure. The iron plate is a movable structure.

[0042] As Figure 3 shown, based on the above tool, the application further provides a use method of the tool for leveling the condensate pump of a nuclear power plant, and the specific steps are as follows:

[0043] Step 1: connecting flange 1 is directly connected with the flange of the condensate pump;

[0044] Step 2: connect the crane with lifting ring 4, and lift the condensate pump to a certain height;

[0045] Step 3: judge the levelness of the pump at this time through the information returned by horizontal sensor 10, and adjust through remote control;

[0046] Step 4: lead screw 3 cooperates with fixed shaft 5, and rolling shaft 6 moves with the movement of the main support;

[0047] Step 5: horizontal sensor 10 feeds back a signal that the pump body has been adjusted after being horizontal.

[0048] The tool works in the following way: the condenser pump is hoisted by the lifting tool, after hoisting, the electric adjusting device is operated remotely using remote control, the lifting ring moves left and right as a whole, the overall leveling effect is achieved by using the principle of eccentricity, and the risk of using the crane multiple times can be reduced.

[0049] The above merely provides a specific implementation of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which shall be covered within the protection scope of the present application.

Claims

1. A leveling tool for condensate pumps in nuclear power plants, characterized in that, The device includes a connecting flange (1), an electric adjusting device (2), a lead screw (3), a lifting ring (4), a fixed shaft (5), a rolling shaft (6), and a bracket (7). The bracket (7) is located above the connecting flange (1). The lead screw (3) passes through the fixed shaft (5) and is connected to the electric adjusting device (2). The lifting ring (4), the fixed shaft (5), and the rolling shaft (6) are located between the two iron plates above the bracket (7).

2. The leveling tool for condensate pumps in nuclear power plants according to claim 1, characterized in that, The connecting flange (1) and the bracket (7) are connected by welding.

3. The leveling tool for condensate pumps in nuclear power plants according to claim 1, characterized in that, The lead screw (3) passes through the interior of the fixed shaft (5) and is connected by threads.

4. The leveling tool for condensate pumps in nuclear power plants according to claim 1, characterized in that, The rolling shaft (6) is slidably mounted on the support track.

5. The leveling tool for condensate pumps in nuclear power plants according to claim 1, characterized in that, The electric adjustment device (2) has an electrically connected servo motor (8), battery (9), control circuit (11) and reduction gear (12). The battery (9) supplies power to the servo motor (8). The servo motor (8) is connected to the reduction gear (12). The reduction gear (12) and the lead screw (3) are connected in a transmission connection.

6. The leveling tool for condensate pumps in nuclear power plants according to claim 5, characterized in that, The electric adjustment device (2) is equipped with a level sensor (10), which transmits a signal to the control circuit (11) after reaching a horizontal position.

7. The leveling tool for condensate pumps in nuclear power plants according to claim 6, characterized in that, The control circuit (11) is equipped with a signal receiver, which receives the signal.

8. The leveling tool for condensate pumps in nuclear power plants according to claim 6, characterized in that, The horizontal sensor (10) is arranged above the battery (9).

9. The leveling tool for condensate pumps in nuclear power plants according to claim 5, characterized in that, The servo motor (8) is arranged below the battery (9).

10. A method of using a leveling tool for a condensate pump in a nuclear power plant as described in any one of claims 1 to 9, characterized in that, include: Step 1: The connecting flange (1) is connected to the condensate pump via a flange connection; Step 2: Connect the crane to the lifting ring (4) and lift the condensate pump to a certain height; Step 3: Determine the level of the condensate pump at this time based on the information returned by the level sensor (10), and adjust it remotely via remote control; Step 4: The lead screw (3) cooperates with the fixed shaft (5) so that the rolling shaft (6) moves with the main support; Step 5: The level sensor (10) returns a signal indicating that the pump body has been adjusted after reaching a horizontal position.

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